Possible Clues:

• Kindergarten learning
• Characters in order of appearance
• Letters mixed up in this anagram of 'Paul has to be the foremost of pillocks!'
• On radio, it includes Romeo and Juliet
• Characters one remembers from early schooldays
• Group leader with live-time characters
• Order in a preschool classroom
• Ewart's letters describe first course to take
• -- soup, a type of clear soup containing pasta in the shape of letters
• Characters collectively gaining height on mountain with support